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- Staphylococci among Wild European Rabbits from the Azores: A Potential Zoonotic Issue?Publication . Sousa, M.; Silva, V.; Silva, A.; Silva, N.; Ribeiro, J.; Tejedor-Junco, M.T.; Capita, R.; Chenouf, N.S.; Alonso-Calleja, C.; Rodrigues, T.M.; Leitão, M.; Gonçalves, D.; Caniça, M.; Torres, C.; Igrejas, G.; Poeta, P.The prevalence and diversity of Staphylococcus species from wild European rabbits (Oryctolagus cuniculus) in the Azores were investigated, and the antibiotic resistance phenotype and genotype of the isolates were determined. Nasal samples from 77 wild European rabbits from São Jorge and São Miguel islands in Azores were examined. Antibiotic susceptibility of the isolates was determined using the Kirby-Bauer disk diffusion method, and the presence of antimicrobial resistance genes and virulence factors was determined by PCR. The genetic lineages of S. aureus isolates were characterized by spa typing and multilocus sequence typing. A total of 49 staphylococci were obtained from 35 of the 77 wild rabbits. Both coagulase-positive (8.2%) and coagulase-negative (91.8%) staphylococci were detected: 4 S. aureus, 17 S. fleurettii, 13 S. sciuri, 7 S. xylosus, 4 S. epidermidis, and 1 each of S. simulans, S. saprophyticus, S. succinus, and S. equorum. The four S. aureus isolates showed methicillin susceptibility and were characterized as spa type t272/CC121, Panton-Valentine leukocidin negative, and hlB positive. Most of the coagulase-negative staphylococci showed resistance to fusidic acid and beta-lactams, and multidrug resistance was identified especially among S. epidermidis isolates. The mecA gene was detected in 20 isolates of the species S. fleurettii and S. epidermidis, associated with the blaZ gene in one S. epidermidis isolate. Five antimicrobial resistance genes were detected in one S. epidermidis isolate (mecA,dfrA,dfrG,aac6'-aph2'', and ant4). Our results highlight that wild rabbits are reservoirs or "temporary hosts" of Staphylococcus species with zoonotic potential, some of them carrying relevant antimicrobial resistances.
- The impact of comet assay data normalization in human biomonitoring studies outcomesPublication . Esteves, Filipa; Amaro, Raquel; Silva, Susana; Sánchez-Flores, María; Teixeira, João Paulo; Costa, CarlaThe comet assay has been extensively used in biomonitoring studies. To avoid intra-experimental variability, the incorporation of assay controls in each work session for data normalization has been suggested by some authors but has never been thoroughly analyzed. The aim of this study was to address the impact of data normalization in the results of a biomonitoring study using different normalization models. Human peripheral blood mononuclear cells (PBMC) from 140 healthy individuals were analyzed using the alkaline and FPG-modified version of the comet assay across seven different work sessions. In addition to negative standards, methyl methanesulfonate (MMS) and Ro 19−8022 plus light treated PBMC, were also included in the assay as positive standards. To verify the impact of data normalization, some demographic, lifestyle and environmental exposure-related variables were selected. Significant associations with independent study variables were observed using normalized comet endpoints, as opposed to raw data. After normalization, levels of DNA strand breaks were significantly higher among males and older individuals (>71 years), while net FPG-sensitive sites were positively related to smoking habits and environmental exposures (i.e. air pollution and bottled water consumption). This study highlights how the normalization strategies can influence the statistical results of a human biomonitoring study and lead to different data interpretations.
- Prevalência de Cardiopatias Congénitas em Portugal em 2015: Dados do Registo Nacional de Anomalias CongénitasPublication . Melo, Isabel Saraiva de; Braz, Paula; Roquette, Rita; Sousa, Paulo; Nunes, Carla; Dias, Carlos MatiasIntrodução: A prevalência de cardiopatias congénitas em Portugal é de 8,3/1000 nascimentos; cardiopatias congénitas críticas não detectadas podem resultar em graves consequências para o feto/recém-nascido. O objectivo deste trabalho é descrever os casos de cardiopatia congénita reportados em Portugal em 2015 quanto ao diagnóstico pré-natal, patologia cardíaca e à presença de outras malformações congénitas ou anomalias cromossómicas. Estas características são comparadas nos subgrupos dos nados-vivos e de interrupção médica da gravidez. Por último, caracterizam-se os óbitos. Material e Métodos: Os dados de cardiopatias congénitas reportadas ao Registo Nacional de Anomalias Congénitas em 2015 foram analisados, e calculadas as taxas de prevalência por 1000 nascimentos, comparadas utilizando teste de independência do quiquadrado. Resultados: A prevalência de cardiopatias congénitas neste estudo foi de 5/1000, (339 nados-vivos, 20% com cardiopatias congénitas críticas). As cardiopatias mais frequentes foram as seguintes: comunicação interventricular (38%), comunicação interauricular (15%), coartação da aorta (7%), tetralogia de Fallot (7%) e estenose pulmonar (5%). Um terço dos nados-vivos teve diagnostico pré-natal de cardiopatia. Dos nados-vivos com cardiopatias congénitas críticas, 54% teve diagnostico pré-natal e 14% foi diagnosticado ao nascer. Foram identificados 84 registos de interrupção médica da gravidez; 49% apresentava cardiopatias congénitas críticas, 75% outras malformações associadas, e 40% cromossomopatias. Foram registados 15 óbitos (3,4% de mortalidade) associados a prematuridade e/ou baixo-peso ao nascer, cardiopatias congénitas críticas, outras malformações e anomalias cromossómicas. Discussão: A prevalência de cardiopatias congénitas neste estudo (5/1000 nascimentos) foi inferior ao descrito noutros estudos internacionais, não obstante uma distribuição por tipo de anomalia semelhante ao previamente reportado. Observaram-se assimetrias regionais significativas que necessitam de mais investigação. Conclusão: Este estudo é relevante para melhor conhecimento da realidade nacional e organização dos Cuidados de Saúde. É importante uma maior adesão ao Registo Nacional de Anomalias Congénitas. Palavras-chave: Cardiopatias Congénitas/epidemiologia; Portugal; Registos
- Climate Change and Aflatoxins Contamination in the Iberian PeninsulaPublication . Assunção, Ricardo; Vettorazzi, Ariane; González-Penas, Elena; Martins, CarlaClimate change constitutes an important driver affecting food sector, and consequently represents a public health issue that deserves particular attention. Under this context, mycotoxins emerge as a particular concern since their prevalence and concentrations in food and feed may vary due to climatic conditions. Aflatoxins, the most toxic mycotoxins, present a particular concern, taking into account the potential health effects arising from human and animal exposure. The present article aims to answer two main questions: Are aflatoxins a concern in the Iberian Peninsula? How the climate change could impact aflatoxins contamination and the risk of human exposure in Iberian Peninsula?